Strength of the metal-ligand bonds in some bicyclopentadienyl and dibenzene compounds of 3d transition elements

Abstract

1. The mean values of the “internal” metal-ligand bond dissociation energies ¯D1(M-L) and Wiberg indices calculated by the INDO MO method W(M-L) are virtually invariant within the series of dicyclopentadienyl and dibenzene π-complexes of 3d transition metals. 2. The similarity in the behavior of the ¯D1(M-L) values and the W(M-L) values which characterize covalent bonding indicates that the contribution of the ionic component to the metal-ligand bond is either small or approximately identical in each of these series of compounds.